Rotational Spectra and Astronomical Search of Five Ethynyl Derivatives of Propene

Abstract The interstellar discovery of the five cyano derivatives propene brings interest in analogous molecules that could be detected similar astronomical environments. In this context, ethynyl-propene are good candidates to observed Taurus Molecular Cloud (TMC-1), where other and ethynyl hydrocarbons such as ethane, allene, propene, cyclopentadiene, among others, have been detected. We investigated pure rotational spectra enable their detections. These molecular species produced by an electric discharge were characterized using a Balle-Flygare narrow band-type Fourier-transform microwave spectrometer operating frequency region 4-40GHz. spectral analysis allowed us derive accurate spectroscopic parameters obtain reliable predictions for searches. do not detect any these TMC-1 but we upper limits abundances isomers.